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Find the answer:5+10+15....+2010+2015=


The answer is 407030.

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2 solutions

Vishal S
Jan 1, 2015

If we take 5 out as common, we get

5(1+2+3+.....403)

=>5(403(404) / 2)

=>5(81406)

=>407030

{{(2015-5)/5 diff between terms}+1}x{(2015+5)/2}=407030

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